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STEAM GENERATOR.

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UNITEDA STATES PATENT @erica JOSEPH MILLER AND DANIEL HOWARTH, OF OLEAN,NEW YORK, ASSIGN- ORS OF ONE-HALF TO MILLS W. BARSE, OF SAME PLAGE.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 273,579, dated March 6,1883.

Application led October i8, 1882. (No nodel.)

To all whom 'it may concern:

Be it known that We, JOSEPH MILLERand DANIEL HOWARLH, of Olean, in thelcounty of Oattaraugus and State of New York, have invented certain newand uselul Improvements in Steam-Generators, ot' which the following isa full, clear, and exact description.

The object ofour invention is the construction of a' durablesteam-boiler for the rapid 1o generation ot'steamand by economical useot' nel.

To that end our invention'consists in awaterchamber placed to form theback or bridge wall of the furnace and provided with circulationtubes,which extend into the tire-box and combustion-chamber, as hereinalterdescribed and claimed. t

Bel'erence is to be had to theaccompanying drawings, forming part ot'this specification, in zo which similar letters of reference indicatecor responding parts in all the ligures.

Figure 1 is a longitudinal section of a boiler of our improvedconstruction. Fig. 2 is a transverse section of the same on the line a:.fr

of Fig. l. Fig. 3 shows the connection of the tubes to the shell ofthewater-chamber. Fig. 4 is an end view ot' the connecting-tube.

A is the {ire-box, provided with grate-bars c, and having its upper sideformed at an in- 3o clination, as shown.

B is the boiler or water-chamber, placed at the back ot' the tire-box,and extending into the side Walls at its ends.

C is the combustion-chamber at the back of.

the boiler B, and D is the chimney.

' E is thesteam-drum, which extends transversely ot the tire-box andabove the boiler, being supported by the side walls of the tire- `box;but the drum may, it' desired, extend 4o lengthwise ot' the stack. Theposition of the drum is such that there is a space between the upperedge of theboiler B and the under side ot' the drum, so that theproducts of combustion from the fire-box may pass freely over. b is atube connecting the drum E and boiler B, and d is an interior tube,which extends down to or near the middle portion ot' the-Water-chamberB. It is to be supported back ofthe. tire-box.

in any suitable manner, and serves to prevent disturbancetof theequilibrium of the water 5o by the steam passing to the drum.

Thewater-chamberorboilerBismadeoflong and flat form, so as to form abridge-wall at the To the sides ot the waterchamber B the tubes c areconnected by both ends to the shell ot' the boiler, and they pro ject,those on one side into the tire-box A, and those at the other side intothe combustionchamber O. 'lhey are also placed alternately, so that theheat and products of combustion 6o passing through between them `shallbe caused to come more intimately in contact with the tubes. The tubesare attached by the unions F, (shown in Figs. 3 and 4,) which are formedat one end with aright-hand thread to receive the tube, and at the otherend with a reverse thread for entering the shell of the boiler. rlheyareto be made of steel or malleableiron, and are formed with an angle-facedportion, which allows' attachment of a wrench. The 7o tubes e may beplaced on one or botb sides of the Water-chamber, and as they are allattached with one end ot' each higher than the other a circulation ot'water through them is secured,

This construction furnishes a safe, inexpen- 'sive, and durable boilerof com pact form, not liable to become injured by expansiouandcontraction. 1t is to be observed that each tube isindependent, so thateach one'is free to ex- 8o pand and contract, according tothe heat itmay receive, without att'ecting the others. There will be a continualcirculation of thewater through the tubes, which will cause sediment tofall to the bottom of the water-chamber B, lWhere' hand-holes areprovided for its removal.

Having thus f ully described our invention, what we claim as new, anddesire to secure by Letters Patent, isy l. The combination, with thefurnace hav- 9o ing chimney D, of the transverse steam-drum E, partly inthe furnace, the bridge wall boiler B, having on each side the pipes c,connecting therewith at both ends, and the connectingpipe b, whereby theproducts of com. bustion will come in Contact with the drum,

both sides of the boiler and the pipes ou each side ofthe boiler, asdesvribefl.

2. The combination, with the boiler, steamdrum, tube b. and furnace, allarranged subslebntally as described, of the pipes c, curved suooessivelyaround one another and secured at both ends to the boiler, and the tubed, having its upper end in the steam-drum audits lower end in theboiler, below the upper end ofl each pipe c, as shown, tooperarte asdescribed. Io

JOSEPH MILLER. DANIEL HOWARTH.

Witnesses:

M. W. BARsE, E. C. HOWARD.'

